The chairman of the Federal Communications Commission has opened an investigation into NPR and PBS over the public broadcasters’ airing of commercials. Brendan Carr, President Donald Trump’s pick to lead the agency,

Federal Communications Commission Chairman Brendan Carr said he is launching investigations into both PBS and NPR, in the hopes of helping Congress defund the public broadcasters. His basis for the investigation stems from what he alleges are potentially unlawful commercials.

The investigation will revolve around NPR and PBC airing sponsorships across their 1,500-plus member stations, FCC Chairman Brendan Carr said.